Abstract. In
this paper, cylindrical active cancellation system (ACS) based on controllable
waveguide Van Atta reflector with circulators, power amplifiers and phase
shifters is proposed. Scattering characteristics of a horizontally polarized
plane electromagnetic wave on a conducting cylinder with ACS are investigated
numerically using Ansys HFSS. The simplified numerical model without
controlling device allowed to find RCS minimization condition through the
search of signal power and phase in ACS antennas ports. It is shown that power in
ports, which is required to minimize RCS, is proportional to the RCS value of
the ACS with matched antennas. It is shown that independent phase shifters
controlling can maintain Van Atta array self-focusing at not normal angles of
incidence. Results obtained at
10 GHz
show that it is possible to minimize
cylinder RCS more than -50 dB in desired direction. Worst case -10 dB dumping
in 3° angle sector and 300 MHz band is achieved. In addition, the radiation
patterns and scattering diagrams of the ADS for different minimization angles
are shown.
Key
words: RCS minimization, stealthiness,
cylinder, active damping system, Van Atta array, monostatic RCS.
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For citation:
F. S. Topalov. Numerical
study of the scattering characteristics of a cylindrical active dumping system
based on a controlled Van-Atta array. Zhurnal
Radioelektroniki - Journal of Radio Electronics. 2019. No. 1. Available at
http://jre.cplire.ru/jre/jan19/12/text.pdf
DOI 10.30898/1684-1719.2019.1.12